A free-running visual memory prosthetic might in general indicate to the
wearer that he or she has seen a particular object
before. For example, it might alert the wearer wandering around
in circles that he or she has been in that particular place before.
In some sense it could function as the visual equivalent of Starner's
rememberance agent[20] (a text interface that constantly
watches what the user types and automatically reminds the user of
related text files).